Autodesk 12812-051462-9011 User Guide 3 - Page 1050

Max. Reflections Sets the number of times a ray can be reflected. At 0, no reflection occurs. At 1, the ray can be reflected once only. At 2, the ray can be reflected twice, and so on. Default=5. Max. Refractions Sets the number of times a ray can be refracted. At 0, no refraction occurs. At 1, the ray can be refracted once only. At 2, the ray can be refracted twice, and so on. Default=5. Use Falloff (Limits Ray Distance) When on, uses the Start and Stop values to limit the length of light rays used for regathering before using the environment color. This can help improve regathering time, especially for scenes that are not fully enclosed by geometry. Default=off. ■ Start Specifies the distance, in 3ds Max units, at which rays begin. You can use this value to exclude geometry that is too close to the light source. Default=0.0. ■ Stop Specifies the maximum length, in 3ds Max units, of a light ray. If the ray reaches this limit without encountering a surface, then the environment is used for shading. Default=0.0. FG Point Interpolation group These settings provide access to the legacy method of final gather point interpolation. Use Radius Interpolation Method When on, makes the remaining controls in this group available. Also makes the Interpolate Over Num. FG Points check box on page 6300 unavailable, indicating that these controls override that setting. Radius When on, sets the maximum radius within which final gathering is applied. Reducing this value can improve quality at a cost of rendering time. If Radii In Pixels is off, the radius is specified in world units, and defaults to 10 percent of the maximum circumference of the scene. If Radii In Pixels is on, default=5.0 pixels. If both Radii In Pixels and Radius are off, the maximum radius is the default value of 10 percent of the maximum scene radius, in world units. Radii in Pixels When on, the radii values are specified in pixels. When off, radii units depend on the value of the Radius toggle. Default=off. Min. Radius When on, sets the minimum radius within which final gathering must be used. Decreasing this value can improve render quality but increase rendering time. Unavailable unless Radius is turned on. Default=0.0. If Radii In Pixels is on, default=0.5. mental ray Renderer | 6305